Cefn Hoile wrote: > THE BASIC PROBLEM > > I have managed to set up a debian system with Alsa recognising 4 > identical soundcards - C-Media USB Headsets. However, I am only able > to address one of the devices by name, or by hardware address. > > One of these devices is apparently assigned the identifier 'default' > by alsa. I can play back sound through this card using either... > aplay sound.wav > aplay --device=default sound.wav > > When I run... > aplay -l > ...it tells me that there are four devices, named... > > default > default_1 > default_2 > default_3 > > ...but using any of these other names default_1, default_2, default_3 > throws a pesky error saying > > Sample format non available This naming scheme looks strange, never seen anything before that. I think it is done by your distribution, but I am not sure. So, back to solving problems:
"Sample format not available" - just means what it says. You have either to use plug:hw:[0123], which does sample format and rate conversion automatically (you should also be able to use default:[0123], which gives you dmix/dsnoop on top, when needed), or choose a supported sample format - this includes rate, channel count, data format (Little vs Big Endian, 16 vs 24 bit, 24 bit packed vs 32 bit padded). To get aware of supported formats, start aplay with -v for the default device, which will print the software as well as the hardware sample format. And to really use one of the hw:x devices, your file has to be in the correct format, so just use default:1 for example.\ Greetings, Stefan ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
